Year	days
2009	86.48
2010	86.48
2011	84.2
2012	78.5
2013	91.68620689655172
2014	75.22206896551724
2015	70.48620689655174
2016	69.53206896551724
2017	68.5551724137931
2018	63.47931034482759
2019	62.34965517241379